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Content available Design and experiment of membrane-type acoustic metamaterials used in EMUs to control low frequency noise
Liu Peng, Lin Hao, Gao Pan, Tian Pengyi, Jiang Chengcheng, Song Leiming, Dong Xiaoqing
Journal of Theoretical and Applied Mechanics
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2025
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Vol. 63 nr 2
279--287
EN
Acoustic metamaterials, a new type of material with great design flexibility, have been widely studied by scholars in recent decades. For high-speed electric multiple units (EMUs), a membranetype acoustic metamaterial is used to design a lightweight sound insulation material that adapts to the space requirements within the low frequency range. A theoretical analysis on the membrane-type acoustic metamaterial was carried out. The sound insulation coefficient was calculated. Experimental comparisons were conducted on six different thicknesses of films combined with five types of additional masses. The experimental results verified the sound insulation performance. It has great potential for designing lightweight noise reduction structures.
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